Fully tested and VIN-programmed OEM ECM/ECU for the 2012 Mercedes-Benz S-Class 5.5L engine. Bench-tested, calibrated, and ready to install — no dealer programming required.

Fully tested and VIN-programmed OEM ECM/ECU for the 2012 Mercedes-Benz S-Class 3.0L engine. Bench-tested, calibrated, and ready to install — no dealer programming required.

Fully tested and VIN-programmed OEM ECM/ECU for the 2012 Mercedes-Benz S-Class 6.0L engine. Bench-tested, calibrated, and ready to install — no dealer programming required.